Detection Condition

PCM compares actual input signal from Mass Airflow/Intake Air Temperature (MAF/IAT) sensor with expected input signal from MAF/IAT sensor which PCM calculates by input voltage from Throttle Position (TP) sensor or engine speed. If mass intake airflow amount is 0.90 lb./min. (6.8 grams/sec.) or less for 5 seconds and throttle opening angle is 50 percent or more with engine running, PCM determines detected mass intake airflow amount is too low. If the mass intake airflow amount is 14.43 lbs./min. (109.3 grams/sec.) or more for 5 seconds and engine speed is 2000 RPM or less with engine running, PCM determines detected mass intake airflow amount is too high. This is a Continuous Monitor (CM). MIL illuminates if PCM detects malfunction condition in two consecutive drive cycles or in one drive cycle while DTC for same malfunction has been stored in PCM. PENDING CODE is available if PCM detects malfunction condition during first drive cycle. FREEZE FRAME DATA is available. DTC is stored in the PCM memory.